BG engine - pipelines Total Processing Time

we are facing problem with process engines and their Total processing time. Is there any possibility how to decrease this value? I'm attaching printscreens from GUI and configuration from properties.xml. We tried restarting BG services but it had no effect.

we had a bug in v12, when we run the delete process instance it used to leave orphan records. So i wanted to check that. But thats not the case with you. So the next is to check if you have multiple BG server and is the multicast working properly.